Unlike some years back when websites were almost exclusively static, the standard today is to have a feature-rich, dynamic site. Not many people can create this type of site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script application. Many hosting service providers offer script installers that can be used to add this sort of an application for each of your domain or subdomains, so you'll not need to set up anything manually. The main benefit of using an installer tool is the fact that the scripts are available to use in a few minutes and the copy that'll be set up is already with the settings necessary for it to run the way it should on the particular hosting server, so you will not have to change any script or account settings. This way you can quickly build one with simply a couple of clicks even though you may have never had a site before.